lttng-modules 2.7.1-1 ADT test failure with linux-hwe 4.8.0-37.39~16.04.2

[Andy Whitcroft]

SRU Justification:

Impact: When kernel 4.8 becomes available as HWE option, DKMS build of lttng-modules will break.

Fix: Backport lttng-modules version from Yakkety

Testcase:
 - install: build-essential babeltrace lttng-tools
           lttng-modules-dkms liblttng-ust-dev
 - dkms build for 4.4 and 4.8
 - run test script after booting into 4.4 and 4.8

---

Testing failed on:
    amd64: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-xenial-canonical-kernel-team-unstable/xenial/amd64/l/lttng-modules/20170205_185403_4aa7d@/log.gz
    armhf: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-xenial-canonical-kernel-team-unstable/xenial/armhf/l/lttng-modules/20170205_185205_4aa7d@/log.gz
    i386: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-xenial-canonical-kernel-team-unstable/xenial/i386/l/lttng-modules/20170205_191840_4aa7d@/log.gz
    ppc64el: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-xenial-canonical-kernel-team-unstable/xenial/ppc64el/l/lttng-modules/20170205_190204_4aa7d@/log.gz
    s390x: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-xenial-canonical-kernel-team-unstable/xenial/s390x/l/lttng-modules/20170205_184954_4aa7d@/log.gz

[Stefan Bader (smb)]

Trying to selectively pick the kernel patches from Yakkety on top of the Xenial version is rather hard as some things are covered by the upstream version change (4.5 compat) and also rely on other rework. Backporting the complete package appears like the more stable and simple path.

[Stefan Bader (smb)]

Looks like yakkety has a version of that in proposed that probably needs release first.

[Stefan Bader (smb)]

The backport into Xenial compiles 4.4 and 4.8 kernels and both kernel versions run the smoke test from bug #11285881 successfully.

[Stefan Bader (smb)]

Sorry cur and paste error: the correct bug reference is bug #1625072.

[Andy Whitcroft (apw)]

Hello Andy, or anyone else affected,

Accepted lttng-modules into xenial-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/lttng-modules/2.8.0-1ubuntu1~16.04.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

[Stefan Bader (smb)]

root@bar-maasc01:~# dpkg -l|grep xtables-addons-dkms
ii xtables-addons-dkms 2.10-1ubuntu0.1 all Extensions targets and matches for iptables

root@bar-maasc01:~# dkms status |grep xtables-addons
xtables-addons, 2.10, 4.4.0-67-generic, x86_64: installed
xtables-addons, 2.10, 4.8.0-42-generic, x86_64: installed

[Stefan Bader (smb)]

darn... wrong report into wrong bug

[Stefan Bader (smb)]

root@bar-maasc01:~# dpkg -l|grep lttng-modules-dkms
ii lttng-modules-dkms 2.8.0-1ubuntu1~16.04.1 all Linux Trace Toolkit (LTTng) kernel modules (DKMS)

root@bar-maasc01:~# dkms status|grep lttng
lttng-modules, 2.8.0, 4.4.0-67-generic, x86_64: installed
lttng-modules, 2.8.0, 4.8.0-42-generic, x86_64: installed

[Launchpad Janitor (janitor)]

This bug was fixed in the package lttng-modules - 2.8.0-1ubuntu1~16.04.1

---------------
lttng-modules (2.8.0-1ubuntu1~16.04.1) xenial; urgency=medium

  * Backport into 16.04/Xenial to fix build with 4.8 kernels (LP: #1662114).

 -- Stefan Bader <email address hidden> Wed, 08 Feb 2017 11:16:36 +0100

[Brian Murray (brian-murray)]

The verification of the Stable Release Update for lttng-modules has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.